Blog · October 14, 2026 · Missouri
Black Jack Flood Map: checking a property's flood zone
The zone on FEMA's map affects insurance, building and resale near Florissant.
Main page: St. Louis County, MO GIS & Parcel Viewer (official map link, county facts and neighboring maps).
Platbookmapper is an Amazon Associate. If you buy through an Amazon link on this page, we earn a commission. The link is a product, not the county map.
Weighing a property around Ferguson? A quick look at the Black Jack flood map shows whether the lot falls inside a mapped floodplain, and no account is needed. Covered here for Black Jack: the free FEMA tools, what each zone label means, lender insurance rules and how to challenge a map that looks wrong.
Checking the Black Jack flood map step by step
Start with FEMA's Flood Map Service Center: type an address near Bellefontaine Neighbors, then open the map view for that panel. Vacant ground around Dellwood can still be found: search the nearest road and click the spot.
Getting to the right map
Your first stop is the St. Louis County ArcGIS parcel map; it includes each tax parcel around Bellefontaine Neighbors and Florissant. In and around Calverton Park, type a street address, an owner's name or a parcel number, then pick the result to center the map on it. For acreage around Ferguson, the parcel card usually lists the owner of record, acreage on the tax roll, the parcel number and often a sale date.
A short flood checklist
Request about past flood claims on the property near Ferguson; getting a quote early avoids surprises.
Sections, lots and bearings
Missouri uses the Public Land Survey System, so deeds around Moline Acres reference sections and townships. A standard section is about one square mile, roughly 640 acres, with 36 sections to a township, though sections near Bellefontaine Neighbors can be irregular. Write down the legal description for the tract near Bellefontaine Neighbors before you request a deed or survey.
Limits of the parcel data
The acreage figure is a tax-roll number; only a licensed surveyor sets the real lines for a parcel near Calverton Park. Around Ferguson, owner names and values update on a schedule, so a deed recorded last month may not show yet.
Black Jack, MO: the basics
Black Jack is part of St. Louis County, Missouri, which means parcel data comes from the county. For a tract near Calverton Park, city or town hall handles things like zoning, permits and utilities for lots inside the boundary, while the county keeps the tax map. Land beyond the city limits out by Ferguson generally answers to county rules instead.
Reading A, AE and X
An AE label carries a published BFE, while plain Zone A does not; surveyors near Bellefontaine Neighbors use that number. On ground around Moline Acres, a low-risk label isn't a guarantee: according to FEMA, floods happen outside mapped zones too.
Getting your bearings
For a parcel near Calverton Park, clayton is the county seat, which is where the courthouse records live. Other places on the map include Dellwood, Florissant, Calverton Park, and Bellefontaine Neighbors. If the land is near Florissant, roughly 987,059 people live in St. Louis County (Census Bureau estimate, 2023) across roughly 508 square miles. St. Louis County dates to 1812, and some chains of title near Moline Acres are long. Landmarks such as Spanish Lake Park and Babler State Park help you orient on the aerial around Dellwood.
Parcel lines plus flood zones
FEMA doesn't draw property lines, so check the St. Louis County ArcGIS parcel map too for the outline of the tract near Calverton Park.
Getting answers from the right desk
For assessment questions about property around Florissant belong with the County Assessor, since that office keeps the assessment data. Zoning, permits and septic questions near Moline Acres need the planning or permitting office, and the answer depends on jurisdiction.
Low spots and local drainage
Small streams around Moline Acres aren't always studied in detail, so look for water marks and debris lines. Marshy spots near Dellwood can limit building too; check the National Wetlands Inventory mapper for a first look.
Where the recorded documents are
The map is an index, not the title: deeds, plats and easements for land near Bellefontaine Neighbors sit with the Recorder of Deeds. Closer to Bellefontaine Neighbors, have ready the instrument number listed on the parcel record to skip a name search.
Lenders and permits
For a tract near Florissant, ask for an Elevation Certificate: it compares the building to the BFE. Building or adding on near Moline Acres in a mapped zone usually means extra permit review; check with the county or town building office early.
Questions about the Black Jack flood map
When is flood insurance required around Ferguson?
Usually, for a building near Dellwood in an A or V zone with a federally backed or regulated mortgage, it's generally required, in communities that take part in the NFIP.
Why did my flood zone near Florissant change?
For most people, zones near Bellefontaine Neighbors can shift when FEMA updates a panel; check the effective date on the panel.
Does the county parcel map show flood zones around Bellefontaine Neighbors?
A flood layer may appear in the St. Louis County ArcGIS parcel map layer list; confirm a lot near Florissant on FEMA's map either way.
Is AE a high-risk flood zone near Bellefontaine Neighbors?
Short answer: an AE zone has a 1% annual chance of flooding and a base flood elevation, so builders near Dellwood design to that elevation.
Can I use the viewer in the field near Calverton Park?
The map near Ferguson usually works on a phone, though rural signal can drop.
Open the official St. Louis County, MO parcel map See it in the Platbookmapper directory
Not a survey. County GIS and tax parcel maps are assessment and planning layers. They are not a substitute for a recorded plat, deed, or licensed survey, especially for fences, setbacks, or boundary disputes.